Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a velocidade para o rank 1?
 ###Tabelas: CREATE TABLE lpga_tour_15 (lpga_tour_15_id AUTO_INCREMENT PRIMARY KEY, No. INT, Date VARCHAR, Tournament VARCHAR, Winning score VARCHAR, To par VARCHAR, Margin of victory VARCHAR, Runner(s)-up VARCHAR, Winners share ( $ ) INT) CREATE TABLE administrative_districts (administrative_districts_id AUTO_INCREMENT PRIMARY KEY, District VARCHAR, s Barangay INT, Population (2010 census) INT, Area ( has .) INT, Pop. density (per km2) INT) CREATE TABLE twin_cylinder_race (twin_cylinder_race_id AUTO_INCREMENT PRIMARY KEY, Rank VARCHAR, Rider VARCHAR, Team VARCHAR, Speed VARCHAR, Time VARCHAR) CREATE TABLE past_competitions (past_competitions_id AUTO_INCREMENT PRIMARY KEY, Years VARCHAR, Competition VARCHAR, Vehicle Name VARCHAR, Original Vehicle VARCHAR, Architecture VARCHAR) CREATE TABLE attendances (attendances_id AUTO_INCREMENT PRIMARY KEY, Season INT, Average Attendance Home VARCHAR, Highest Attendance Home VARCHAR, Average Attendance Away VARCHAR, Highest Attendance Away VARCHAR, Division / Section VARCHAR, Level VARCHAR, Average Attendance League VARCHAR)  
SELECT Speed FROM twin_cylinder_race WHERE Rank = 1